public function personal_user()
    {
        return $this->morphOne('AppModelsPersonalUser', 'userable');
    }

    public function business_user()
    {
        return $this->morphOne('AppModelsBusinessUser', 'userable');
    }

$comments = ArticleComments::orderBy($orderBy,'desc')
                ->with(['user', 'article'])
                ->whereHas('article.translations', function($q)
                    use($default_language_id,$article_title) {

                    $q->where('language_id', $default_language_id)
                    ->where('title','like',$article_title);
                })->paginate(10);